The toolbar is of no use for me, it occupies space, I use shortcuts to achieve all functions the toolbar provide. In Eclipse 3.7 we can right click the toolbar and hit "hide toolbar", but how to do that in Eclipse 4?
Menu was gone but the command seems to be available still now.
Preferences > General > Keys
Type "toggle t" in filter text, then "Toggle Toolbar Visibility" will appear. It seems to work when some key is assigned.